According to Wikipedia, women have prostates, but not in the same sense as men. It's called the Skene's Glands and it's located on the vagina, near the urethra. It was renamed the female prostate in 2002. en.wikipedia.org/wiki/Prostateen.wikipedia.org/wiki/Skene%27s_gland
And, maybe, prominent could be the word you're looking for? Though, pronounced makes perfect sense.

With sufficient lube and prep it's not uncomfortable, if it hurts then they're not doing it right or aren't ready. Some people don't enjoy it, and thus don't do it. Being gay does not mean a person is guaranteed to enjoy it, men and women find it pleasurable.

The anus has a very high concentration of nerve endings which cause pleasure in most people when properly stimulated. When penetrated, these nerve endings are stimulated, which causes pleasure for one partner, while the other partner gains pleasure from the tightness of it.

Feces is only stored in the rectum when it is ready to be ejected from the body. While traces may remain, depending largely on diet, there are no large masses of feces present in the rectum throughout the day or during intercourse.